石墨-FeNi核-壳结构复合微球的制备  

The Preparation of Graphite-FeNi Core-Shell Structural Composite Microspheres

作　　者：李东红[1] 陈栋[1] 李旺兴[2] 沈湘黔[1] 景茂祥[1] 

机构地区：[1]江苏大学,江苏镇江212013 [2]中国铝业股份有限公司郑州研究院,河南郑州450041

出　　处：《稀有金属材料与工程》2007年第4期728-731,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50134020);江苏大学自然科学创新预研基金(04CX01)

摘　　要：以硫酸亚铁、硫酸镍、碳酸钠和石墨微球为主要原料,利用非均相成核工艺制备出水合氧化铁和碱式碳酸镍均匀包覆石墨的前驱体微球;通过对前驱体进行热还原处理得到了晶粒约为50nm的γ-FeNi合金颗粒层包覆石墨的产物微球。利用SEM,EDS,XRD对前驱体和产物的形貌、成分、物相分别进行了表征,并利用TG/DSC对前驱体热分解过程进行了分析。通过研究,得出了制备这种核-壳结构复合微球的优化工艺参数。The precursors of hydrate ferric oxide and basic nickel carbonate coated graphite mierospheres were synthesized by the aqueous heterogeneous nucleation process using ferrous （Ⅱ） sulfate, nickel sulfate, sodium carbonate and graphite microspheres as main raw materials. Subsequently, the composite mierospheres of graphite core coated with γ-FeNi alloy particles with grain size of about 50 nm were successfully obtained by hydrogen reduction of the precursors. The morphology, composition, phases were characterized by using scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS）, X-ray diffraction （XRD） respectively, also the thermal decomposition of the precursors were investigated by employing thermogravimetry-differential scanning calorimetry （TG/DSC）. On the basis of study, optimized processing parameters of preparing this kind of core-shell structural composite mierospheres were obtained.

关 键 词：石墨微球 铁镍 非均相成核 核-壳结构 

分 类 号：TB33[一般工业技术—材料科学与工程]